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Cerium(III) iodide

Names
IUPAC name Triiodocerium
Other names Cerous triiodide, Cerium triiodide
Identifiers
CAS Number	7790-87-6
3D model (JSmol)	Interactive image
ChemSpider	109878
ECHA InfoCard	100.029.299
EC Number	232-228-3
PubChem CID	123265
UNII	Z422836G9D
CompTox Dashboard (EPA)	DTXSID70999098
InChI InChI=1S/Ce.3HI/h;3*1H/q+3;;;/p-3Key: ZEDZJUDTPVFRNB-UHFFFAOYSA-K
SMILES I(I)I
Properties
Chemical formula	CeI3
Molar mass	520.829 g·mol
Appearance	yellow solid
Melting point	766 °C, 752 °C
Solubility in water	soluble
Solubility in acetone	soluble
Structure
Crystal structure	PuBr3
Coordination geometry	8-coordinate bicapped trigonal prismatic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Cerium(III) iodide (CeI₃) is the compound formed by cerium(III) cations and iodide anions.

Preparation

Cerium metal reacts with iodine when heated to form cerium(III) iodide:

2 Ce + 3 I₂ → 2 CeI₃

It is also formed when cerium reacts with mercury(II) iodide at high temperatures:

2 Ce + 3 HgI₂ → 2 CeI₃ + 3 Hg

Structure

Cerium(III) iodide adopts the plutonium(III) bromide crystal structure. It contains 8-coordinate bicapped trigonal prismatic Ce ions.

Uses

Cerium(III) iodide is used as a pharmaceutical intermediate and as a starting material for organocerium compounds.

References

1. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 1240–1241. ISBN 978-0-08-037941-8.
2. ^ Imamoto, Tsuneo (15 April 2001). "Cerium(III) Iodide". Encyclopedia of Reagents for Organic Synthesis. John Wiley & Sons, Ltd. doi:10.1002/047084289X.rc043. ISBN 9780471936237.
3. ^ Wells, A. F. (1984). Structural Inorganic Chemistry (5th ed.). Oxford University Press. p. 421. ISBN 978-0-19-965763-6.
4. ^ Asprey, L. B.; Keenan, T. K.; Kruse, F. H. (1964). "Preparation and Crystal Data for Lanthanide and Actinide Triiodides". Inorg. Chem. 3 (8): 1137–1141. doi:10.1021/ic50018a015.
5. "7790-87-6 - Cerium(III) iodide, ultra dry, 99.9% (REO) - Cerium triiodide - 13641 - Alfa Aesar". alfa.com. Retrieved 2017-09-19.

• Cerium(III) compounds
• Iodides
• Lanthanide halides